MXD63B600L - 600Amp Circuit Breaker

MXD63B600L - 600Amp Circuit Breaker

Replacing a breaker in an older electrical system isn't always as simple as matching the amperage. The size, connection points, trip unit, and interrupting rating all need to match. The MXD63B600L is a 600-amp600-amp, 3-pole molded-case circuit breaker from the MXD6 series, used in compatible commercial and industrial electrical distribution equipment. It has a non-interchangeable trip unit and comes with line-side and load-side lugs. Its interrupting ratings are 25 kA at 600 VAC, 50 kA at 480 VAC, and 65 kA at 240 VAC. For qualifying 2-pole DC applications, it's rated at 30 kA at 250 VDC. The breaker measures 16 inches high, 9 inches wide, and 6 inches deep, so check available space and mounting arrangement as carefully as the electrical specifications. If you're maintaining equipment that originally used the MXD63B600L, this breaker provides the same model configuration without changing the intended electrical setup. It's built to last and designed for service within its stated ratings. For electricians and maintenance crews working on existing power distribution systems, the right breaker makes the job easier.

Key Features and Benefits

• Designed for electrical systems that require a 600A molded-case circuit breaker.
• Designed for compatible three-phase electrical applications.
• Matches the specified breaker type used in existing MXD6 installations.
• 25kA at 600VAC, 50kA at 480VAC, and 65kA at 240VAC.
• 30kA at 250VDC for qualifying 2-pole applications.
• Uses a fixed trip-unit configuration rather than a separately interchangeable unit.
• Line-side and load-side lugs are supplied with the breaker.
• Suitable for maintaining compatible equipment that requires the MXD63B600L's original specifications.

Technical Specifications

• Part Number: MXD63B600L
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Type: MXD6
  
• Amperage: 600 Amps
  
• Poles: 3
  
• A.I.C. at 600VAC: 25kA
  
• A.I.C. at 480VAC: 50kA
  
• A.I.C. at 240VAC: 65kA
  
• DC Interrupting Rating: 30kA at 250VDC (2-pole applications)
  
• Trip Unit: Non-Interchangeable
  
• Line-Side Lugs: Included
  
• Load-Side Lugs: Included
  
• Dimensions:
  • Height: 16 inches
  • Width: 9 inches
  • Depth: 6 inches

Material Compliance and Certifications

• The MXD63B600L has specified AC interrupting ratings for 240V, 480V, and 600V applications, along with a DC rating for qualifying 2-pole installations at 250VDC. These ratings should be checked against the electrical system's requirements before the breaker is installed.
• The supplied specifications do not include information about the breaker's material composition, UL listing, CSA certification, or RoHS compliance. Refer to the manufacturer's documentation and the breaker's markings to confirm applicable certifications.

Where It Works Best

• The MXD63B600L 600 amp circuit breaker is primarily suited for replacement work in existing commercial and industrial electrical systems. It's especially useful when the equipment was originally designed for this MXD6 breaker model, and you want to keep the original configuration intact.